JPH0469357B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a nuclear reactor monitoring device. The present invention relates to a monitoring device suitable for achieving automation and unmanned monitoring of various parts such as between a shielding wall and the like.

"Prior Art" Generally, regular maintenance and inspection work is carried out in nuclear power plants to maintain their safety, but various works inside the reactor containment vessel after the start of nuclear power operation are Since the work area is in a radiation environment, it is necessary to adequately control the radiation dose of workers. for example,
When conducting a visual inspection of pipe welds, the radiation dose in the work area is measured to confirm that it is below the standard value, and consideration is taken such as carrying a pocket dosimeter. However, this resulted in problems such as an increase in the number of work steps.

``Object of the Invention'' The present invention has been made in view of the above circumstances, and aims to automate and unattend the monitoring work of each part of the reactor inside the reactor containment vessel, thereby improving the efficiency of regular maintenance and inspection work. At the same time, the aim is to reduce the radiation exposure of workers, and to improve the health of the reactor by making it possible to monitor the necessary areas and collect data freely during reactor operating conditions. It is something to do.

"Structure of the Invention" In order to achieve these objects, the nuclear reactor monitoring device according to the present invention includes a ring-shaped rail disposed along the circumferential direction on the upper inner wall of the reactor containment vessel;
A rotating carriage mounted on the rail, an arm connected to the rotating carriage and arranged along the inner radius of the reactor containment vessel, a position adjustment carriage mounted on the arm, and a position adjustment carriage mounted on the arm. A hanging machine arranged on a trolley to support the monitoring work equipment in a suspended state, and a horizontal rotation angle interposed between the position adjustment trolley and the monitoring work equipment to set the horizontal direction of the monitoring work equipment. A configuration including an adjustment mechanism is adopted.

"Operation" When the swinging vehicle is activated, the arm swings along the circumferential direction of the reactor containment vessel. When the position adjustment trolley is activated, the monitoring work equipment suspended by the hanging machine is moved in the radial direction of the reactor containment vessel, and when the horizontal rotation angle adjustment mechanism is activated, the monitoring work equipment is moved in the radial direction of the reactor containment vessel. The horizontal orientation changes and settings are made.

Therefore, the position and orientation of the monitoring work equipment is set in a state in which horizontal oscillations are added to the circumferential direction, radial direction, and vertical direction of the reactor containment vessel.

``Example'' Hereinafter, an example of the present invention will be described based on the drawings. FIG. The reactor shielding wall, numeral 3 is a reactor containment vessel, numeral 4 is a dry well, numeral 5 is a diaphragm floor, numeral 6 is piping, numeral 10 is a monitoring device, and numeral 11 is a horizontal rotation mechanism. 2 and 3, numeral 12 is a hanging mechanism, numeral 13 is a horizontal rotation angle adjustment mechanism, numeral 14 is a vertical movement angle adjustment mechanism, and numeral 15 is a monitoring work equipment (for example, a television camera). , 16 is a rail, 17 is a rotating carriage, 18 is an arm, 19 is a ring-shaped frame, and 20 is a position adjustment carriage.

To explain these details, the horizontal swing mechanism 11 includes a ring-shaped rail 16 as shown in FIG. 2 laid horizontally on the upper inner wall of the reactor containment vessel 3, and The structure includes a plurality of rotating carriages 17 mounted thereon, radial arms 18 connected to the rotating carriages 17, and a ring-shaped frame 19 interconnecting the arms 18.

Further, as shown in FIGS. 2 and 3, the hanging machine 12 is provided with a position adjustment trolley 20 that supports the arm 18 so as to be movable in its length direction, as shown by arrow A in FIG. It is a winch or the like that is attached to a machine and has, for example, a plurality of wires to prevent horizontal rotation of a suspended object.

The horizontal rotation angle adjustment mechanism 13 and the vertical rotation angle adjustment mechanism 14 provided at the lower end of the hanging machine 12 can each be finely adjusted so as to have a rotation angle that swings within a range of 180°, for example. things are applied.

Furthermore, when the monitoring work equipment 15 is a television camera, it is provided with means for transmitting the photographed image to the outside of the reactor containment vessel 3.

Note that both adjustment mechanisms 13 and 14, both trolleys 1
7 and 20 are equipped with a drive motor, etc. inside thereof, and are equipped with a means for operating from a far corner from outside the reactor containment vessel 3, and each adjustment mechanism 13, 14, monitoring work equipment 15 , both trolleys 1
The means for transmitting a power source such as electric power to 7, 20,
A method of suspending a combustible cable from the top cover of the reactor containment vessel 3 in a relaxed state;
Alternatively, by mounting batteries on both carts 17 and 20, motors and the like are driven to perform the required movement.

Therefore, in a monitoring device having such a configuration, when the object to be monitored is, for example, the piping 6 shown in FIG. , operate the horizontal rotation mechanism 11 and the hanging machine 12, and further,
Horizontal rotation angle adjustment mechanism 13, vertical rotation angle adjustment mechanism 1
4 and set the monitoring work device 15 in the required position and orientation to monitor, for example, take pictures of pipe welds. In addition, in this case, since the hanging machine 12 horizontally moves the monitoring work equipment 15 in the radial direction of the reactor containment vessel 3, for example, if the pipe is installed vertically, any surrounding By directing the monitoring device 15 toward the piping and setting its vertical movement angle, monitoring can be performed in any combination of vertical, horizontal, and diagonal directions.

Next, another embodiment of the present invention will be described with reference to FIG. 4. In the example shown in FIG. 4, a hanging device 21 such as a small crane is movably provided on the arm 18 of the horizontal rotation mechanism 11. The hanging machine 21 is also equipped with horizontal rotation and vertical movement functions of the boom 21a as shown by the arrows, improving the mobility of the hanging machine 21 and combining the functions of the horizontal rotation mechanism 11. The synergistic effect allows the monitoring work equipment 15 to be moved so that a relatively wide area can be monitored.

Note that since the monitoring equipment 15 is supported in a suspended state from the head of the reactor containment vessel 3, the monitoring work equipment 15 is supported in a suspended state from the head of the reactor containment vessel 3. This device can be hung in a gap and monitor every corner of the piping 6, etc. within the gap, but by installing the monitoring device at the position shown by the chain line in Figure 1, it is possible to monitor the reactor shielding. It also becomes possible to monitor the outer periphery of the wall 2.

"Effects of the Invention" As explained above, according to the present invention, the following effects can be achieved.

(a) Monitoring work equipment can be moved while suspended inside the reactor containment vessel, and the work of setting its orientation can be carried out remotely, so it is not affected by radiation and is easy for workers. Exposure dose can be reduced.

(b) Monitoring can be carried out freely not only during periodic maintenance and inspection but also during reactor operation.

(c) Horizontal rotation is used to move the monitoring work equipment in multiple directions, combining the rotational movement using a rotating trolley, the radial movement of the reactor containment vessel using a position adjustment trolley, and the vertical movement using a hanging machine. Since the function of adjusting the direction of the swing state by operating the angle adjustment mechanism is added, each part inside the reactor containment vessel can be efficiently monitored from each direction.

(d) As described above, the health of the reactor is improved by collecting monitoring data from any monitoring point over a wide range of circumferential, vertical, and radial positions from multiple directions. be able to.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention, in which Figure 1 is a partially sectional front view showing the overall schematic structure, Figure 2 is a perspective view, and Figure 3 is a main part. FIG. 4 is a front view and a perspective view showing another embodiment of the present invention. 1...Reactor pressure vessel, 2...Reactor shielding wall,
3...Reactor containment vessel, 4...Dry well, 5
...Diaphragm floor, 6...Piping, 10...
Monitoring device, 11...Horizontal rotation mechanism, 12...Hanging machine, 13...Horizontal rotation angle adjustment mechanism, 14...
Vertical movement angle adjustment mechanism, 15...Monitoring work equipment, 1
6...Rail, 17...Swivel traveling trolley.

Claims (1)

[Claims] 1. A ring-shaped rail disposed along the circumferential direction on the inner wall of the reactor containment vessel, a swinging carriage mounted on the rail, and a ring-shaped rail connected to the swinging carriage and extending in the radial direction of the reactor containment vessel. an arm disposed along the line; a position adjustment trolley on which the arm is mounted;
A hanging machine arranged on the position adjustment trolley to display the monitoring work equipment in a suspended state, and a hanging machine arranged in an interposed state between the position adjustment trolley and the monitoring work equipment to set the horizontal direction of the monitoring work equipment. 1. A nuclear reactor monitoring device characterized by comprising a horizontal rotation angle adjustment mechanism.